import "server-only";

const DEBUG = process.env.NODE_ENV !== "production";
const MAX_ARRAY_ITEMS = 3;

const RESET = "\x1b[0m";
const CYAN = "\x1b[36m";
const GREEN = "\x1b[32m";
const YELLOW = "\x1b[33m";
const RED = "\x1b[31m";
const BOLD = "\x1b[1m";
const DIM = "\x1b[2m";

function statusColor(status: number): string {
  if (status >= 500) return RED;
  if (status >= 400) return YELLOW;
  return GREEN;
}

/**
 * Keeps big paginated lists (e.g. a 19-store `results` array) from flooding the
 * terminal — shows the first few items of any array plus a count, recursively.
 */
function truncateForLog(value: unknown): unknown {
  if (Array.isArray(value)) {
    const shown = value.slice(0, MAX_ARRAY_ITEMS).map(truncateForLog);
    if (value.length > MAX_ARRAY_ITEMS) shown.push(`… ${value.length - MAX_ARRAY_ITEMS} more item(s)`);
    return shown;
  }
  if (value && typeof value === "object") {
    return Object.fromEntries(Object.entries(value).map(([key, v]) => [key, truncateForLog(v)]));
  }
  return value;
}

function prettyJson(value: unknown): string {
  return JSON.stringify(truncateForLog(value), null, 2);
}

function indent(text: string): string {
  return text
    .split("\n")
    .map((line) => `    ${line}`)
    .join("\n");
}

/**
 * Dev-only request/response logging — the terminal-equivalent of Chrome's Network
 * tab for server-side calls, since they run on the Next.js server and the browser
 * never sees them (no CORS on the Winofy API). Never runs in production.
 */
export function logWinofyRequest(method: string, url: string, body: unknown) {
  if (!DEBUG) return;
  console.log(`\n${CYAN}→ [winofy]${RESET} ${BOLD}${method}${RESET} ${url}`);
  if (body !== undefined) console.log(`${DIM}  body:${RESET}\n${indent(prettyJson(body))}`);
}

export function logWinofyResponse(method: string, url: string, status: number, data: unknown) {
  if (!DEBUG) return;
  console.log(`${statusColor(status)}← [winofy] ${status}${RESET} ${BOLD}${method}${RESET} ${url}`);
  if (data !== null && data !== undefined) console.log(`${DIM}  data:${RESET}\n${indent(prettyJson(data))}`);
}